High power LED lighting device using high extraction efficiency photon guiding structure

摘要

The present invention discloses a high power light emitting device using a high extraction efficiency photon-guiding structure for producing high-efficiency white light output with large viewing angle and large amount of light emitted from the side surfaces so that they can provide different light patterns for different applications such as street lighting, parking lighting, tunnel lighting, and etc., as they are used with a reflector. The emitter consists of a leadframe package or chip-on-board substrate, plurality of LED chips, silicone encapsulation material containing phosphor materials to convert short wavelength LED-emanated light to longer wavelength of light, a photon-guiding structure that enhances the efficiency of the LED package and provides light output with large viewing angle.